* {
    margin: 0;
    padding: 0;
    border: 0;
    list-style: none;
    text-decoration: none;
}

body {
    width: 100%;
    background-color: rgba(219, 219, 219, 0.521);
}

header {
    min-width: 1260px;
    height: 50px;
    background-color: rgb(81, 119, 235);
}

.navbar.navbar-expand-lg{
    background-color: rgb(81, 119, 235);
}

.nav-top {
    width: 1260px;
    height: 50px;
    background-color: rgb(248, 248, 248);
    margin: 0 auto;
}

.logo-div {
    height: 80px;
}

.logo-div img {
    margin-left: 20px;
    margin-right: 20px;
    height: 80px;
}

.nav-item {
    width: 140px;
    text-align: center;
}

.nav-link{
    color: white;
}

.nav-link.active {
    font-weight: bold;
    background-color: rgb(228, 228, 228);
}

.info-div {
    width: 240px;
    height: 50px;
}

.info-div p {
    color: white;
    width: 230px;
    height: 50px;
    line-height: 50px;
    text-align: right;
    margin-right: 10px;
}

main {
    width: 1260px;
    min-height: 800px;
    margin: 52px auto 40px;
    padding-bottom: 10px;
    background-color: rgb(248, 248, 248);
}

.main-top-nav {
    width: 1260px;
    height: 50px;
    padding: 10px 20px;
}

.breadcrumb{
    width: 590px;
    float: left;
    line-height: 25px;
    border-bottom: 1px solid rgb(87, 87, 87);
}

.now-time-div{
    color: rgb(255, 255, 255);
    width: 210px;
    float: right;
    background-color: rgb(168, 168, 168);
    text-align: center;
}

.info-div a{
    text-decoration: none;
    color: white;
}

.info-div a:hover{
    color: red;
}

.breadcrumb li {
    color: black;
}

.li-first{
    margin-right: 20px;
}

.breadcrumb-item {
    font-size: 14px;
    line-height: 25px;
}

.breadcrumb-item.active {
    font-weight: bold;
}

.breadcrumb-item a {
    color: rgb(87, 87, 87);
    text-decoration: none;
}

.main-content-div{
    clear: both;
}

/* 底部 */
footer {
    width: 100%;
    height: 40px;
    line-height: 40px;
    background-color: #333;
    color: #fff;
    text-align: center;
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}